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        <h2>
          <span class="refentrytitle">lowres</span>
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        <p>lowres — 
      Another resonant lowpass filter.
          </p>
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      <div class="refsect1">
        <a id="idp121008752"></a>
        <h2>Description</h2>
        <p>
      <span class="emphasis"><em>lowres</em></span> is a resonant lowpass filter.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp121010400"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">ares <span class="command"><strong>lowres</strong></span> asig, kcutoff, kresonance [, iskip]</pre>
      </div>
      <div class="refsect1">
        <a id="idp121012656"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>iskip</em></span> -- initial disposition of internal data space. A zero value will clear the space; a non-zero value will allow previous information to remain. The default value is 0.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp121014640"></a>
        <h2>Performance</h2>
        <p>
      <span class="emphasis"><em>asig</em></span> -- input signal
    </p>
        <p>
      <span class="emphasis"><em>kcutoff</em></span> -- filter cutoff frequency point
    </p>
        <p>
      <span class="emphasis"><em>kresonance</em></span> -- resonance amount
    </p>
        <p>
      <span class="emphasis"><em>lowres</em></span> is a resonant lowpass filter derived from a Hans Mikelson orchestra. This implementation is much faster than implementing it in Csound language, and it allows <span class="emphasis"><em>kr</em></span> lower than <span class="emphasis"><em>sr</em></span>. <span class="emphasis"><em>kcutoff</em></span> is not in Hz and <span class="emphasis"><em>kresonance</em></span> is not in dB, so experiment for the finding best results.
    </p>
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      <div class="refsect1">
        <a id="idp121021040"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the lowres opcode. It uses the file <a class="ulink" href="examples/lowres.csd" target="_top"><em class="citetitle">lowres.csd</em></a>.
      </p>
        <div class="example">
          <a id="idp121022816"></a>
          <p class="title">
            <strong>Example 448. Example of the lowres opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac     <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o lowres.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span>  <span class="op">=</span> 1

<span class="oblock">instr</span> 1

kres <span class="op">=</span> p4
asig <span class="opc">vco</span> .2, 220, 1		<span class="comment">;sawtooth</span>

kcut <span class="opc">line</span> 1000, p3, 10		<span class="comment">;note: kcut is not in Hz</span>
as   <span class="opc">lowres</span> asig, kcut, kres	<span class="comment">;note: kres is not in dB</span>
aout <span class="opc">balance</span> as, asig		<span class="comment">;avoid very loud sounds</span>
     <span class="opc">outs</span> aout, aout

<span class="oblock">endin</span>
<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
<span class="comment">; a sine</span>
<span class="stamnt">f</span> 1 0 16384 10 1

<span class="stamnt">i</span> 1 0 4 3
<span class="stamnt">i</span> 1 + 4 30
<span class="stamnt">i</span> 1 + 4 60
<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
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        <p><br class="example-break" />
    </p>
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      <div class="refsect1">
        <a id="idp121027040"></a>
        <h2>See Also</h2>
        <p>
      <a class="link" href="lowresx.html" title="lowresx"><em class="citetitle">lowresx</em></a>
    </p>
      </div>
      <div class="refsect1">
        <a id="idp121029152"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: Gabriel Maldonado (adapted by John ffitch)</td>
          </tr>
          <tr>
            <td>Italy</td>
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        <p>
    </p>
        <p>New in Csound version 3.49</p>
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